DE19644533C1 - Closable rotary grip for upper part of valve - Google Patents

Abstract

The rotary grip has a spindle driver (4) fixed on a valve spindle (7) which in a certain position is coupled in positive engagement with the rotary grip (1). The rotary grip (1) has an inner toothed rim (14) and the spindle driver (4) has an outer toothed rim (17) at the same level. The grip also has at the inner end a rigidly connected pinion-type coupling part (15) with teeth (16), which matches the inner and outer toothed rims (14,17) of the rotary grip and the spindle driver. The closure cylinder (6) locates in an intermediate component part (9) which is rotatably located around the spindle driver (4) in a position of a closure cylinder (6) preventing the operation of the valve.

Description

The invention relates to a lockable Rotary handle for valve tops or the like, with one on the valve stem attached to the valve stem, which is only in the position of the valve which allows the valve to be operated Lock cylinder radially offset parallel to the spindle coupled with the twist grip and otherwise it is freely rotatable in the rotary handle.

Such a coupling device between the handwheel and spindle is for example from DE-PS 40 23 67 known. This is primarily intended for use in industrial areas or the like and therefore has no special aesthetic appearance Appearance on. The individual parts consist of Metal, so that also some processing steps are necessary.

In order to create a compact, inexpensive to manufacture Lockable twist grip for valve upper parts was to create the twist grip DE 36.39 306 C2 developed. Because the parts are essentially made up They are made of plastic and are molded parts Manufacturing costs can be kept relatively low. However are considerable cost of the shapes of the parts necessary in their design still appear to be relatively complex.

The invention is therefore based on the object previously described twist grip so that the Individual parts and the production of the same further simplified be, so that the manufacturing costs are reduced and thus the constantly increasing price pressure can be counteracted.

This object is achieved by the Features of claim 1 solved.  

Appropriate further refinements of the invention are shown in marked the subclaims.

The twist grip according to the invention exists, apart from that metallic locking cylinder with key, practically only three molded plastic parts. The assembly of the twist grip can apart from the usual locking screw for the Spindle drivers can be done quickly and easily without tools.

Here, too, are part of the complete valve bonnet of course the usual metal parts, like the valve stem Locking plate or cone and the associated, on the Valve body screw-on spindle bearings. These parts are conventional design and comply with the applicable standards, if specified. That means a conventional valve with the parts according to the invention for lockability can be retrofitted.

In the drawing is an embodiment of the invention shown. It shows

Fig. 1 in side elevational view of a rotary handle on a simple dispensing valve,

Fig. 2 shows a section of a valve upper part with the rotary handle according to the invention,

Fig. 3 is a plan view of the rotary handle,

Fig. 4 shows a section along the line IV-IV in Fig. 2.

A lockable rotary handle 1 for an upper part 2 of valves or the like, for example as shown in FIG. 1 with a simple dispensing valve 3 , has a bell-shaped rotary handle 1 , a spindle driver 4 and a cover cap 5 (see also FIG. 2). All of these parts are molded plastic parts and can be assembled without tools. This also applies to the insertion of a locking cylinder 6 into a corresponding bore axially parallel to the valve spindle 7 of an intermediate component 9 which is also made of plastic and which can be rotated relative to the spindle driver 4 with a certain intended friction (will be explained later) when the valve is not in use , wherein the locking cylinder 6 snaps into place when inserted into the bore.

The intermediate component 9 has on its outer circumference 10 a circumferential bead 11 , on which the rotary handle 1 is freely rotatably supported with an inner circumferential groove 13 into which the bead 11 is engaged when the valve upper part 2 is closed. The arrangement of the bead 11 and the circumferential groove 13 can also be such that the intermediate component 9 has the circumferential groove on its outer circumference 10 , in which the inwardly projecting bead of the rotary handle 1 then snaps into place and is freely rotatable.

The rotary handle 1 has an internal ring gear 14 , in which a coupling part 15, which is connected in a rotationally fixed manner to the locking cylinder 6 , engages in a form-fitting manner, specifically with a toothing 16 , which then also engages in an external ring gear 17 of the spindle driver 4 . In order to actuate the locking cylinder 6 by means of a key 18 ( FIG. 1), the bore 8 must be brought congruently over the locking cylinder 6 by turning the rotary handle 1 with the bore 8 .

If the twist grip 1 is completed, that is to say freely rotatable, and the key 18 is pulled out of the locking cylinder 6 , forms after twisting the twist grip 1 , that is, if the bore 8 of the locking cylinder 6 z. B. turned to position 8 '(dash-dotted lines in Fig. 3), the closed part of the top of the handle 1 above the lock cylinder 6 itself a weather protection for this. No additional part is required for this, so that the weather protection cannot be lost, as is often the case with separate parts.

For easier engagement, the upper tooth flank edges of the coupling component 15 and the lower tooth flank edges of the rotary handle 1 and the spindle driver 4 are pointed or chamfered.

The spindle driver 4 has an internally toothed bore 19 with which it is plugged onto the valve spindle 7 , which is externally toothed at the end, and is secured in the usual way with a screw 20 which is screwed into a central threaded bore of the valve spindle 7 . The head of the screw 20 presses, possibly with the interposition of a washer, on a shoulder 21 in the bore 19 , which is smooth cylindrical from this shoulder 21 to the upper end of the spindle driver 4 and closed to the outside with the aforementioned cap 5 , the is permanently locked into a central bore 22 of the rotary handle 1 and can only be removed by destroying it.

When the valve is closed, ie when the coupling part 15 is out of engagement with the toothed rings 14 and 16 when it is not in use, as shown in FIG. 2, the rotary handle 1 can be freely rotated on the intermediate component 9 . So that the bore 8 of the rotary handle 1 for unlocking the locking cylinder 6 can be brought congruently over it, the intermediate component 9 may not yet rotate during this process when the rotary handle 1 is turned . For this purpose, an O-ring 24 is provided between the spindle driver 4 and the intermediate component 9 , both of which are axially fixed to one another by a clip-like catch 23 , which increases the friction, ie when the valve is closed, the rotary handle 1 on the intermediate component 9 can be turned more easily the latter on the spindle driver 4 .

The entire kit consisting of rotary handle 1 with inserted locking cylinder 6 , spindle driver 4 and intermediate component 9 is supplied completely, although the cover cap 5 is attached separately, since this cannot be detached from the central bore 22 of the valve spindle 7 until it is screwed on Turning handle 1 is engaged. Thus, as already mentioned, the screw 20 is only accessible after the cap 5 has been destroyed.

It goes without saying that the lockable rotary handle 1 described can be used for practically all types of valves or the like. Use for heating control valves is also conceivable.

Reference list

1

Twist grip

2nd

Top

3rd

Nozzle

4th

Spindle driver

5

Cover cap

6

Locking cylinder

7

Valve stem from

2nd

8th

Hole for

6

in

1

9

Intermediate component

10th

outer scope of

9

11

Bulge

10th

12th

-

13

Circumferential groove in

12th

14

Internal ring gear in

1

15

Coupling component

6

16

Gearing on

15

17th

External ring gear from

4th

18th

Key for

6

19th

Drilling in

4th

For

7

20th

screw

21

Paragraph in

19th

22

Drilling in

1

23

clip-like catch for

4th

and

9

24th

O-ring

Claims (6)

1. Lockable twist grip for upper parts of valves or the like, with a spindle driver fastened to the valve spindle, which is positively coupled to the twist grip only in the position of the actuation of the valve that allows a locking cylinder radially offset parallel to the spindle and is otherwise freely rotatable relative to the twist grip is mounted, characterized in that the turning handle ( 1 ) has an internal ring gear ( 14 ) and the spindle driver ( 4 ) has an external ring gear ( 17 ) at the same height and that after release by turning a key ( 18 ) axially parallel to the spindle ( 7 ) Movable locking cylinder ( 6 ) seated in an intermediate component ( 9 ) has at the inner end a pinion-like coupling component ( 15 ) rigidly connected to it and having a toothing ( 16 ) which leads to the inner and outer ring gear ( 14 and 17 ) of the rotary handle ( 1 ) or spindle driver ( 4 ) fits. 2. Twist grip according to claim 1, characterized in that the intermediate component ( 9 ) in the position preventing the actuation of the valve of a locking cylinder ( 6 ) is rotatably mounted about the spindle driver ( 4 ). 3. Twist grip according to claim 1 or 2, characterized in that the twist grip ( 1 ) with the intermediate component ( 9 ) and this with the spindle driver ( 4 ) are each axially fixed via detents ( 11 , 13 and 23 ). 4. Twist grip according to claim 1, characterized in that the upper tooth flank edges of the coupling component ( 15 ) and the lower tooth flank edges of the twist grip ( 1 ) and the spindle driver ( 4 ) are pointed or chamfered. 5. Twist grip according to one of claims 1 to 4, characterized in that the twist grip ( 1 ) has a bore ( 8 ) to be brought into alignment with the locking cylinder ( 6 ). 6. Twist grip according to one of claims 1 to 5, characterized in that between the spindle driver ( 4 ) and the intermediate component ( 9 ) a friction resistance between these increasing O-ring ( 24 ) is provided.